Timing device for loom stop mechanism



w. P. CRAIG TIMING DEVICE FOR LOOM STOP MECHANISM M ch 28, 1933.

Filed March 29. 1932 2 Sheets-Sheet 1 Q Win/AMP CRAIG l mam March 28, 1933. w. P. CRAIG 1,902,

TIMI HG DEVICE FOR LOOM STOP MECHANISM Filed March 29. 1952 2 Sheets-Sheet 2' I mm; 44

\ .lllllllllllllllll mm "HIM zo nmuumllllllll mm gmnntw VV/LL/AM RCaA/G Patented Mar. 2 8 1933 UNITED STATES PAT WILLIAM r. CRAIG, or SHELBY, NORTH cAnoLrNn, Assrenoia or on i ifnArr T cnnvn'; mm) (morn MILL COMPANY, orsnnmzy, nearer CAROLINA, A coRronArIoN-or NORTH CAROLINA amine DEVICE FOR Loon STOP MEorrnnrsM;

Application filed March 2a, 1932. Serial No. 601,861.

I This invention relates to an attachment for looms; and more particularly, for what may be termed a selective stop motion attachment for use on looms equipped with ,a stop motion, by which term is included means for applying and disconnecting power from the loom and braking mechanism and a filling detector adapted to be operated by the exhaustion of the/thread on the shuttle, The detector may operate either mechanically or electrically. M I

It is the present practiceto arrange a lever operatively connected to the loom power control and braking-device insuch manner that it can be rocked into the path of the lay by a suitable mechanical device operated by the filling detector, so that upon the thread becoming exhausted, the filling-detector will operate to rock the knock-off lever into the path of the lay whereuponvthe lay will strike the knock-off lever and operate same-to disconnect the drive power from the loom and brake the loom. Such direct action by the lay on the knock-oil lever is, however, objectionable as it stops the loom, on the first pick, as the filling detector'or filler makes contact with the quill in. the shuttle with the shuttle being in the left hand box of the loom. Where theloom is operated as on a crepe weave, with a two and two box motion, it would be necessary for the weaver-to start the loom and let it run for three picks, and then stop the loom by hand to stop the loom with the shuttle in the right hand box where it could be conveniently removed and replaced. a The present invention relates to an attachment intended to be interposed between the feeler actuated mechanism and the knock-off lever insuch a way that the lay will be permitted to travel a predetermined number of picks, as for instance, two, four, or eight, after the operation of the filling detector or feeler before the knock-oil lever will be rocked into position to beengaged by the lay. Theinvention consists in the novel con struction, arrangement and combination of parts hereinafter more particularly described and claimed. 7 Y I Two sheets of drawings accompany this Eur oFFl-CE specification as part thereof, in which I reference characters indicate like part5.

throughout. V V

Inthe drawings H a V Figure 1 is a fragmentary perspective of a part of a loom showing parts -of the knockoff lever, the lay,.. and-the filler actuated mechanism withlthe present invention-in po-. sition; i

Figure 2 is a back elevation proved attachment;ii

view of theim- Figure3 is a front elevationof thedevicej I F igurel is a vertical 'medialcross' section through the device; and Figure 5 is-a vertical transverse cross'seo tion through the device. i 5 l v Referring to the drawings l f? Numeral 1 indicates a solenoid device ha vingelectrical connections,2.wi th a feelerxor filling. detector (not shown) by -means' of which'exhaus'tion of the-thread in the shuttle; will cause an electrical'current through conductors 2 to actuate solenoid l to rock lever 3 and link 4.

The lay of the loomprovided a of a knock-off lever 7 connected to power and braking controls (not shown), when the lever a predetermined number of picksafter the energizing of solenoid 1 by the feeler.

The timing attachment consists oftwo parallel spaced frame plates 11 and'12, which are secured in spaced parallel relation to each other .by means of collars l3 'and bolts-14, and which aresecured to the looin frame by means of bolts passing through holes 15 provided on plate 12.

"A slide 17 is positioned in suitable grooves bumper bolt 54 adapted to strike the head 6- provided on the inner faces of plates ll-and' 12 soas to be vertically 'slidable through said; u

plates, and this slide "17' is provided near its lower end with a slot 18' throughf' which J end, as at 20, between two links 21, these links being pivoted in turn between the frame 7 plates, as by bolt .22.. A ratchet operating arm 23 is also pivoted to links 21, as at 23,

and arm 23operatively engages a ratchet wheel 24 mounted between the plates on spindle 25, which extends through and beyond the plates on each side. The arm 23 is further provided with an offset shoulder '28,

which is connected as by spring 29'with one of the spacing bolts 14 in such manner as to hold arm 23in constant operative relation to .ratchet wheel 24. I A pawl 30 is pivoted between the plates,

' as at 31, being controlled by spring 32 secured to a pin 33 fixed in one plate. On one end of spindle 25 is mounted a cam member- 26 hav- 7 ing aplurality of convex cam faces 34, her e illustrated as two diametrically opposed parts." A cam lever '35 is pivotally mounted to the adjacent frame plate 11, as at 37, and is held as by spring 35 with its cam engaging part 36 in constant engagement with the cam member 26. This cam lever 35 is further provided at its front end with a depending part 38 which terminates in a hook or finger 39 which extends under operating lever 10.

On the opposite side of the device and the other end of spindle'25 is mounted a'second cam member 27 provided with a plurality of concave cam faces 30, here illustrated as two oppositely disposed depressions. A cam lever 9 having a cam engaging projection 41 is pivotally mounted on plate 12, as at 43, and is held, as by spring 9, in constant engagment with cam member 27. The free end of cam lever9 is provided with a hole 44 to which may'beconnected link 8 which in turn. 1s connected to head '6 of knock-01f lever 7 when in assembled position on the loom.

When 1n position on the loom, the attach 'ment is arranged as illustrated in Figure 1,

from which it will be noted that operating lever '10 extends adjacent knock-off lever head 6, and is-directed toward the bumper bolt 50f the lay, and as thus assembled it will be noted that link 4, instead of being connected directly to the knock-off lever 7 through its head 6, is instead connected to the slide member 17 of the attachment, and the head 6 of the knock-off lever 7, instead of being connected directly to the solenoid, is connected bylink 8 tothe cam lever 9 of the attachment. 7 1

With the attachment in position on the loom, as illustrated in Figure 1, both the knock-off lever head 6 and the operating lever of the lay, and in what may be termed inoperative position. Assuming that the filling conductors 2, and lever 3 rocked, thus elevating slide 17 and raising operating lever into the path of bolt 5 of the lay. When the bolt engages operating lever 10, it will be forced rearwardly rocking. links 21, .until ratchet'arm'23 rises behind a" tooth of ratchet wheel 24. The lay-having continued its reversed movement and released operating lever 10, permits spring 29 to retract, thus drawing rearwardly operating lever-'10and ratchet wheel24 to the extent of one tooth, in which position ratchet wheel 24willbe held by pawl 30. This partial revolution of ratchet wheel 24 and'spindle will*have caused theconvex face on cam member 26 to have moved out of engagementwith the cam engaging part oflever' 35, andspring will accordingly raise lever 35 and cause hook or finger 39 to engage operating le'verl'O, and thus hold this operating lever up in the path of bolt 5 of the lay. Successive picks will re peat the movements of-operating lever 10 until the cam 27 on the rear of spindle 25 is sufficiently rotated-to permit cam engaging part 41 of lever 9 to enter one of the concave cam faces being drawn upwardly and into such engagement by means of spring-9'.

'The lever 9 being connected by link .8 to knock-0E lever 6 will thuselevateknock-oif lever head 6 also intogthe path of bumper bolt 5 of the lay, and'thereupon on the next stroke of the lay, knock-oif lever 7 will be operated, and at the s'ame'time operating lever 10 will also be operated, rotating spindle 25 one more fractionalturn. whichwill be sufi'icient to lower levers 35 and -8 as well as the knock-0E lever head 6,Ileaving the en'- tire device in its initial position as illustrated in Figure 1, and ready for a repetition of the the number of teeth on ratchetwheel 24, the

number of picks interveningbetwe'enthe ini-' tial operation of the filler device and the ultimate operation oftheknock-oiflever may v be modified as may be desired, and thus substantial range in adjustment is permitted and considerable flexibility in the operation 7 of the loom. I 7 v Various modifications will readily suggest themselves in the form and constructionfof parts, but all within the scope of: the present 2 I invention as claimed a What I clalm- 1s:

1. A control device for looms having a knock-off lever movable into and out of the path of the lay and a shuttle feeler operable by the exhaustion of'weft. from the shuttle; compr sing an operating member movable 1nto and out of the path of the lay, meansoperatively connecting said memberwith the iao shuttle feeler device in such manner that said member is moved into the path of the lay upon exhaustion of the weft, and selective ated by engagement of the lay with said operating member to operate the first mentioned lever whereby it will hold the operating member for a predetermined number of picks, in the path of the lay.

3. The device of claim 1 inwhich the selective means includes two levers, one having means engaging the operating lever and the other connected to the knock-01f lever, a ratchet wheel adapted to be operated by reciprocation of the operating lever by the lay,

and cam members rotatable with and by the ratchetoperativeof the said levers.

4. The device of claim 1 in which the selective means includes two levers, one having means engaging the operating leveriand the other connected to the knock olf lever, a ratchet wheeladapted to be operated by reciprocation of the operating lever by the lay, and cam members rotatable with and by the ratchet operative of the said levers, said cam members each having a plurality of circumferentially spaced cam faces whereby a predetermined sequence is obtained in the operation of the operative lever and the two other levers specified. I a

5. In combination with a loom, of that type having a knock-off lever controlling the power and braking meansof the loom and a feeler operative by the exhaustion of thread from the shuttle, means operated by the feeler for selectively rocking the knockoff lever into the path of the loom lay a predetermined number of picks after the feeler is actuated, comprising an operative lever rockable into and out of the path of the lay, means connecting the feeler with the operative lever adapted to rock the latter into the path of the lay, means operated by the operative lever while in the path of the lay a and actuated by the suc cessive engagements of the lay with said operpath of the lay.

6. An attachment for looms comprising a frame adapted to be secured to the frame of the loom and including spaced bearing plates, a spindle journalled in said plates,aratchet cause both of saidlevers to rock out of the fixed on the spindle intermediate the plates,

a pawl controlling the ratchet, a spring controlled lever between the plates having an arm operative of the ratchet, a cam fixedly mounted on each end of the spindle, a lever mounted on the outer face of each plate having a cam engaging part, the lever on one side having a terminalhook adapted toengage the ratchet operating lever and the-cam on that side having circumferentially spaced a convex cam faces adapted to periodically raise the lever in engagement therewith, the cam on the other side having circumferentially spaced concave cam faces adapted to peri 'odically lower the lever in engagement therewith.

frame adapted to be secured to the frame of the loom and including spaced'bearing plates, a spindle journalled in said plates,'a ratchet fixed on the spindle intermediate the plates,

7. An attachment for looms comprising a V a pawl controlling the ratchet, a spring con-*' trolled lever between the plates having an arm operative ofthe ratchet, a cam fixedly mounted on each end of'the spindle, a lever mounted on the outer face of each plate having a cam engaging part, the lever on one side having a terminal hook adapted to engage the ratchet operating lever and the cam on thatcside having circumferentially spaced convex cam faces-adaptedto periodically raise the lever.

in engagement therewith, the cam on the other side having .circumferentially spaced concave cam faces adaptedto periodically lower the lever in engagement therewith, a slide member having means for engaging the ratchet operating lever and guide means on r the plates for said slide member.

In testimony whereof, I aifix my signature.

WILLIAM P. CRAIG.

ative member to hold the operative-member in said path during a predetermined number of strokes of the lay, and means actuated by the operative member and connected with the knock-off lever to rock said knock-off lever into the path of the lay after a predetermined number of strokes of the lay, and 

